Rope clamp



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E. E. GREVE.

ROPE CLAMP.

` E. EL GREVE.

ROPE CLAMP.

APPLICATION FILED FEB. 26. 1920.

Patented June 20, 1922.'

2 SHEETS-SHEET 2.

sara

staar EDG-.AR E. GREVE OLE BELLEVUE, PENNSYLVANIA.

ROPE CLAIMS?.

Macnee.

Application filed February 26, 1920. Serial No. 361,395.

To all 107mm t may concern.'

Be it known that I, EDGAR E. Gnnvn, a citizen of the United States, residing at Bellevue, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful improvements in Rope Clamps, of which the following is a'speciiication.

My invention relates to improvements in clamps for well drilling cables, and more particularly to what are commercially known as wire-rope clamps. Y

lVire-rope clampsot the class to which my invention relates have usually included a body portion having a centrally disposed opening extendingthrough the body, a pair of opposed jaws operable by an eccentric action to clamp the cable, and having elongated body portions disposed within the opening, said elongated body portions being in contact throughout their lengths with the walls of the opening of the body. This construction is objectionable on account of the weight of the structure and the friction encountered in manipulating the parts, the friction being produced by the large area of contacting surfaces. Further objections to these clamps are the high cost of manufacture an d the inability to readily change those parts most subject to wear and breakage.

Among the objects Aof the present invention are, to provide a clamp of the character specified ot simple and eticient construction in which the friction is greatly reduced or entirely eliminated;V a clamp in which the clamping action is effected by revolving the jaw members about fixed parallel aXes of revolution and causing the clamping means to approach and recede from each other without a sliding motion, the movement of lsaid clamping means being on an arc of a circle having its center the axis of the respective jaw ,membersg a clamp capable of being manufactured at considerably less cost than heretofore; and a construction of such a character asto Vpermit .the ready yremoval and replacement of the parts sub-L jected to wear andbreakage during the use of the clamp. 1

In the accompanying drawings which illustrate an application of my invention,

F ig. 1 is a top plan of a clamp embodying ymy invention; c

Fig; 2, a front elevational view;

volution of the passes through the center of the pin or vor, as illustrated, a headed bolt orconnecting the two body members. The parts memtloned constitute a skeleton clamp' body adapted to receive :two opposing jaw-members. As illustrated, plates 2 and 3 are of similar construction, and each is formed with an opening 5 through which the connecting bolt 4 is passed, openings G, and an open space or recessed portion 7. Bolt 4i at its upper end is provided with a head 8 `while its lower end is threaded for the purpose `olf receiving a threaded lock-nut 9.

Disposed between the plates 2 and 3 is a 5, a top plan showing the jawsspaced pair of revoluble opposing jaw-members 10.

Each jaw-member 10 is formed with an elongated body portion 11 extending from the upper tothe lower plate of the clamp body, a pin or projecting member 12 at the upper end of the body portion adapted to be entered in one ot the openings 6 in plate 2, and a similar pin at its lower end adapted to be entered in a corresponding opening 6 of the plate or block 3. A curved liner receiving extension 13is also formedon the upper. and lower ends of the body portion" or each j aw-member. Extension 13 coming into contact with the top and bottom plates act as a stop to limit the opening of the vjaws and to thereby prevent the cable engaging liners from being moved transversely out of register by preventing any substantial longitudinal movement of the jaws relatively to each other. From the above it will be noted that the axis of rev respective jaw-members member 12 and that the axes ofthe jawmembers are parallel.

It will also be noted that the jaw-members are rotatably supported by ,and between the plates 2 and 3 of the skeleton `clamp body and that the contacting surfaces, tending to produce friction between the clamp v body and the jaws, are of a very small area 'body portions of the jaws and projecting la to the body portion Vot the jaw.

16 designates a laterally projecting arm from one aw-member and 1T asimilarly eX- tending arm from the other ausmember. Arm 1G at its outer end is provided with dan element receiving slot 18, and adjacent thereto and on the outer tace ot the arm,

a notch 19 is formed.

Arm 17 is designed `to carry the clamp adjusting and locking means and for this purpose, said arm is enlarged at its outer end as indicated at 20, and is formed with a bloclereceiving recess 21and with an opening through which the clamp adjusting `member 22 is passed. VMember 22 is pivotally mounted in arm 17, this mounting, as shown, being eiiected by the employment of a block member 23 through `which threaded member 22 extends.

Block 23-is provided with extensions 24C,

and 25 designates bolts entered in openings of lugs 25', these bolts being employed for maintaining the block` within the recess. Block 23 is threaded to cooperate with the threads 2G of member 22. Member 22 at one end is provided with an operating handie 27 and mounted on said member at or near its opposite end is a casting or integral structure including a body portion 28, a handle 29, and an elongated lug 30, the latter being adapted to enter the notch or recess 19 of arm 16. 31 designates a loclenut mount-ed on the threaded member 22 beyond the body portion 28 above referred to.

Extending throughout the length ofthe above and below the ends thereof, are liners the liners are securely held in position for gripping the rope or cableC. It will be understood that liners differing in sizes may be employed in this construction in order to adapt the clamp ttor use with rope Vor cables of various diameters, and that the construction is such as to enable the removal and replacementot the liners with yvery 'little trouble.

For the purpose oli` receiving said lin- In the use of the clamp, the clamp is placed on the cable by first separating the arms ot' the movable jaw members, thus permitting the cable to be passed into position to be gripped by the liners. The arms are then moved towards each other and the adjusting member 22 pivot point until a portion therogt enters slot 18 ot arm 16 and the lug 30 engages the notch 19. Operating handle 2T .is then turned, thereby actuating the adjusting screw member 22 for the purpose et' drawing the arms together and causing the cable to be effectively gripped. The clamp is released from the cable by reversing the operation ot the parts just described.

ln manipulating` the clamp, either to close or open the same, the aws together with the rope or liner receiving recesses approach and recede from each otherwithout a slidingmotion and the recesses and the liners disposed therein are caused to move on arcs of circles having their centers the fixed axes otrotation ot the said jaw members.

.What I claim is: Y

1. ina rope clamp, a skeleton body including vertically spaced apart apertured members and means connecting said members, opposing jaw members positioned bctween the body members each including an elongated body portion, longitudinally extending means carried by said jaws and projecting into the body members providing pivotsfor lthe jaws, arms carried by the jaws, and cooperating jaw adjusting means carried by thearms.

2. In a rope clamp, a skeleton body in* cluding an upper and a lower spaced apart apertured member, separable means connecting said members, opposing jaw members positioned between the upper and lower body members each-including an elongated body portion provided with an extension at each end entered in openings of the body members, an arm on each jaw member, and cooperating j avv-adjusting means carried by the arms. j

3. In a rope clamp, a skeleton body including two 'spaced apart apertured members, vertically extending means connecting said members, a jaw member having an elongated body portion disposed between the said body members, a member extending from the upper end of the jaw body portion and entered in an opening of a body member, and a member extending from the lower Vend of the jaw body portions and entered in an opening o't the other body member.

4c. In' a rope clamp, a skeleton body including two spaced apart apertured members, vertically extending means connecting said members, a jaw member having an elongated body portion disposed between the said body members, a member' extending from theupper end of the jaw body porswung around on its tion and entered in an opening of a body member, a member extending from the lower end of the jaw body portion and entered in an opening of the other body member, said jaw member having at one end of its body` portion a liner receiving extension.

5. In a rope clamp, a skeleton body including two spaced apart apertured members, vertically extending means connecting said members, a jaw member having an elongated body portion disposed between the said body members, a member extending from the upper end of the jaw body portion and entered in an opening of a body mem` ber, a member extending from the lower end of the jaw body portion and entered in an opening of the other body member, said jaw member having at one end ol its body portion a liner receiving extension and means igor securing a liner to said extension.

6. In a rope clamp, a body, a pair of opposed rev'oluble jaw members having spaced apart fixed axes of revolution arranged in parallelism, said axes being formed by coacting means on the jaws and body, each jaw member being formed with a rope receiving recess disposed therein and movable in an are of a circle having as its center the axis of rotation of the jaw member, and means on the jaw members for contacting with the body for preventing the rope receiving recesses of the jaws from being moved transversely any substantial distance out oi' registering position with e'ach other.

7. A rope clamp comprising a supporting frame, a pair of jaws pivotally supported in the frame, each of the jaws having a separate axis of rotation, and movable independently or' each other the two axes being parallel, rope engaging means on each jaw and arranged to swing in an arc of a circle the center of rotation of which is the axis of rotation of the jaw, and an extension on the jaws for engagement with the frames for preventing the aws from moving longitudinally relatively to each other.

8. A rope clamp comprising a supporting fra-me, a pair or' jaws pivotally supported in the frame, each 01"' the jaws having a separate axis of rotation, and movable independently of each other which axes are parallel with each other, relatively small spaced apart rope clamping portions at each end of the jaws, said rope clamping portions on each jaw being spaced from each other and so positioned that they swing in an arc of a circle whose center is the center of rotation of their respective jaws, and means for holding the jaws in clamping relation, and an extension on the jaws for engagement with the frames for preventing the jaws from moving longitudinally relatively to each other.

In testimony whereof I allix my signature in presence of two witnesses.

EDGAR E. GREVE.

lVitnesses:

J. M. GEOGHEGAN, W. G. DooLrrTLn, 

